Key-operated lock.



G. DOMBNICO.

KEY OPERATED LOCK.

APPLICATION FILED SEPT. 9, I913.

Patented Mar. 30, 1915.

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THE NORRIS PETERS C0. PHOTO'LITHO" WASHING mu. D. I:

C. DOMENICO.

KEY OPERATED LOCK.

APPLICATION FILED SEPT. 9, 1913.

Patented Mar. 30, 1915.

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Specification of Letters Patent.

Patented Mar. 30, 1915.

Application filed September 9, 1913. Serial No. 788,953.

ciency. And to these ends the invention re-' sides in providing a plurality of latch bolts and adapting one of these to be projected and retracted by a key, and to control the proj ection and retraction of the other latch bolt.

Other objects will appear and be better understood from that embodiment of my invention of which the following is a specification, 'refernce being had to the accompanying drawings, forming part hereof in which Figure 1 is a front elevation of the device in use. Fig. 2 is an elevation on an enlarged scale looking into the lock from the face opposite to that shown in Fig. 1 and with the guard plates removed and also showing the position of the parts in unlocked position. Fig. 3 is a plan of the lock showing the door to which it is connected in section, and disclosing the means for fastening the lock and keeper to the door and door frame. Fig. 4 is a view similar to Fig. 2 but on a reduced scale and showing the position of the parts when the lock is locked and also showing the guard plates and the relative positions of the key holes. Fig. 5 is a vertical cross section on the line 55 of Fig. 2. Fig. 6 is a detail perspective of the main bolt. Fig. 7 is a detail perspective of the tumbler latch for the main bolt.

The lock forming the subject-matter of the present invention is intended for use with safes, receptacles, or with any structure where the employment of a permutation lock may be found necessary. In the embodiment shown the lock is constructed so that access to the parts thereof with a key, may be had from only one face of the door to which the lock is applied, but it will be obvious from what will hereinafter appear, that if so desired, the lock may be readily adapted to permit of access thereto with a key from either face of the door.

In the present instance, the lock casing is indicated by 5, the tumblers by 6, the tumbler sprlngs by 7, the supplemental bolt by 8, the main bolt by 9, the main bolt look by 10, the main bolt tumbler latch by 11, the main bolt latch spring by 12, the main bolt retractor spring by 13, the latch bolt by 14, the latch bolt spring by 15, the hub by 16, the latch bolt look by 17, the latch bolt spring by 18, the latch bolt guides by 19-19, the spindle by 20, the knobs or operating handles by 2121, the inner guard plate by 22, the outer guard plate by 23, the key post by 24, the key bv 25, the key hole slots by 26 and 27, and the casing for the main bolt lock by 28.

The casing 5 is formed of metal and in the present instance is shown as arranged on the inner face of the door 29, to which it is attached by means of tie bolts, one of which is shown in Fig. 3 and indicated by 30, which pass through lugs 31-31 suitably connected to the upper and lower side walls of the casing and through a face plate 32 forming one end wall of the casing and counter-sunk in the front end of the door 29. The casing is additionally secured to the door by the presence of a plate 33 which bears on the face plate 32 and on the front wall of the casing 5, the outer surface of this plate being flush with the side of the door as shown in Fig. 3. The plate 32 is suitably connected to the door by screws (not shown). The plates 32 and 33 have openings to permit the passage of the bolts 8 and 9 from the casing 5 into the keeper 34:. The supplemental bolt 8 is arranged above the bolt 9 and is supported by a stud in the form of a screw 35 which passes through a longitudinal slot 36 in the said bolt 8.

The tumblers 6 are carried by the stud 35 and are arranged so as to control the movement of the bolt 8, said tumblers for this purpose having the usual detents 37 and the longitudinal slots 38 which accommodate the laterally projecting stud 39 carried by the bolt 8. The wards 40 of the key 25 will,

of course, be so proportioned as to lift the various tumblers the required amount during the turning of the key to bring the slots of the tumblers into alinement with the stud, whereby, to permit of the longitudinal movement of the bolt 8. The said bolt 8 and the bit of the key will, of course, each be so adapted to the other as to permit of the key moving the bolt longitudinally when the wards have disengaged the tumblers from the stud 39, and the key turned.

The main bolt 9 is retained in the casing by a pin 41 which passes through a longi tudinal slot 42 in the said bolt and issuitably connected to" the front wall of the easing 5. The outer end of this pin 42 is surmounted by a head in the form of a nut 43. The said bolt 9 is also adapted --.to the.bit of the key and arranged so as to be operated successivelyztozthe bolt 8 upon the turning. .Of the; key.

ilieferring now toFig. 2 the bolt 8 has a depending end portion 44 which interfits ,witli a notchjintheinner end portion of the bolt 9 ,when the parts are positioned as shown in Fig. 2. Referring more particul arly;t o this=positionof the parts it will be seen that (when the bolt 8 is -mov'ed outwardly by thekey 25, it-willcarry with it -the;bolt 9'but when retracted ormoved in- ;wardly gfro n projected position .it .will have no eglfeet vw-l atevt-ir onthe movement of the The main bolt tumbler latch ll'is mount- ;ed for pivotal movement on a stud in the form of ascrew45. This tumbler'latch 11 is formed with !a :lateral extension in the formrofa tooth :46 and an elevated platform 47 and is arranged such relation to the bolt -39 -that .upon initial outward movement of thesaid ,bolt under corresponding move ment of the bolt 8, the tooth 46 will pass into avnotch or detent 48 in the bolt 9 when the .saidibolt is projected by the bolt 8, and thereby jlockthe said bolt 9 .in projected position.

When the parts are positionedas shown in Fig.2,the projecting of the boltsS and 9 is effected by turning the key in a counterclockwise direction and through an arc of about forty-five degrees. Now the distance through which the upper =bolt travelsduring this turning movement of the key is equal to the distance betweenthe innerand intermediate'detents in the tumblers 6 so that at the end of such movement on the part of the bolt 8 the stud 39 will be in the intermediate detents of the tumblers 6 and the bolt :8 locked against longitudinal movement. Now if the turning of the key he continued in a counter-clockwise direction, the ward thereof upon entering the sweep 49 in the :upper side of the bolt 9, will bear on the platform 47 ofthe tumbler latchll and depress the said tumbler latch until the tooth 46 thereof moves {out .of the notch or detent 48. But further turning {movement of the key in a counter-clockwise direction will reflect contact between the ward thereof and the side ofthe sweep 49, whereupon the key will tend to retract the bolt 9, but this tendency will be resisted by the bolt 8 which is now locked by the tumblers '6 and interocke with t b l 9 th ough he p nd ing end portion,44. Consequently after the projecting of the bolts 8 and9 and the turnin a clockwise direction will have the effect of retracting the bolt 8. Now it will be remembered that the bolt 9 is projected so that if instead of withdrawing the key from the lock the turning of the key be continued i'na clockwisedirection and until the bitlenters the detent '50, then further turning ofithelkey in a clockwise direction will eifect afurther projecting. of the bolt 9 into the keeper'54. This second movement on the part of I thebolt I 9 will. efi'ect the tensions ing of the spring 13 by the stud 51 carried by zthebolt- 9.

Theimainibolt lock '10 is herein shown as formed of an angular-shaped piece of springsteelone end of which is connected tozthe rfront faeelof "the casing 5 by a pin 52. The free end portion of thislock carries a laterally extending pin 53 which extends through an opening in the front face of ithe .cas'ing 5 and bears on the bolt 9. The :length ofzthe pin 53 is such-that the spring bodyiportion of the lock will be flexed :and thereby tensioned when the end of the pin bears on :the bolt, as shown in Fig. 2. Referring now to the last-named figure, 54 indicates an opening in thebolt 9 which'isadapted for receivingthe pin 53 and the positionof the opening inthe bolt 9 is such that thesaid opening will move into alinementwithithe pin 53 when the bolt 9 vis :projecteda second time by :the turning of the key :in a clockwise direction as .previously described. Remembering now that 1 when "theparts-are positioned as shown in Fig.2,theispring body portion of the lock 10 will be tensioned, it is'obvious that when the opening .54 moves into alinement with the :pin 53 the :ninwill pass into the opening 1 under the action of the spring body portion ofitheloek 10anclrthereby hold'the said bolt '9 against inward movement by the spring 13. After the second projecting movement is imparted to the bolt 9 by the Key 25 the turning of the latter in a counterclookwisedirectionand into contact with the tnmblersandthe bolt 8, willproject the latter, whereupon the parts will assume the position shown in Fig. 4. Inas-muchas the 12 detent '50 is wider than thedetent 49 the key upon movingthe ,bolt 8 to the posi tion shown in-Fig. 4-may ibeturned in a counter-clockwise direction and :to" the positionshowninFig. 2, at which time it may 1 be a moved from the lock casing and leave theaparts positioned,as shown in Fig. 4 and lQQkcd inasmuch-as the pin '53 on the lock bolt 10 enters the opening 54 in-the bolt 9 h ds the s idnolt :in a'pro ected posi- 3 tion. When the key is introduced into the lock for the purpose of retracting the bolts from the position shown in Fig. 4 the key is first turned in a clockwise direction, whereupon the bit will pass through the detent 50 and depress the tumbler latch 11 and move until the wards raise the tumblers 6 and the bit withdraws the bolt 8. Then the turning of the key is continued in a clockwise direction until the bit thereof is in alinement with a lateral projection 55 on the spring body portion of the lock 10. Referring now to lugs. 2 and 4, this projection 55 passes through an opening made to receive it in the front face of the casing 5 and when the pin 53 is in the opening 54 of the bolt 9 the inner surface of this projection is flush or substantially so with the inner surface of the front face of the casing 5. Here it may be stated that the bit extends a trifle beyond the end of the tubular shank of the key 25 so that when the bit is in alinement with the projection 55 as just described, the said bit will upon the application of hand pressure to the key and in the direction of the length of the same, operate to spring the lock 10 outwardly and withdraw the pin 53 from the opening 54, whereupon the bolt 9 will be retracted under the action of the spring 13 until the notch 48 thereof moves into alinement with the tooth 46 of the tumbler latch 11 at which time the tumbler latch will automatically engage with the bolt 9 under the action of its spring 12. The position of the parts will now be the same as when the bolt 9 was initially projected by the key and the bolt 8 retracted by the key, so that when the key is turned in a clockwise direction from a position where the bit is in alinement with the projection 55 the said bit will enter the sweep 49, depress the tumbler latch 11 and retract the bolt 9 to the position shown in Fig. 2 after which the key may be restored to the position shown in Fig. 2 and withdrawn from the lock. 7

The latch bolt 14 is slidingly fitted in the guides 1919 and its inner end portion is upturned as indicated at 56, and forms a bearing for the tail piece 16 which is connected in the ordinary manner to the spindle 20. Referring now to Figs. 2 and 4 the hub 16 is a double-ended structure and by virtue of this and the upturned end portion 56 of the latch bolt 14 the engaging end 57 of said latch bolt will be withdrawn when the spindle is turned in a clockwise or counter-clockwise direction by the knob 21. The end portion 58 of the latch bolt spring 15 passes through a recess portion in the latch bolt 14 and is arranged so as to be tensioned when the latch bolt is retracted, and operates in the ordinary manner to restore the latch bolt to its normal position when the knob 21 is released.

The latch bolt lock 17 is connected to a spindle 59 which is turnably mounted in the front face of the casing 5 and surmounted by a knob or operating handle 60. The said lock 17 is constructed with an elongated body portion 61 and is so disposed that when the said body portion is turned into the horizontal it will pass behind the engag ing end portion 57 of the latch bolt and by thus lying in the path of movement of the said latch bolt prevent the inward movement thereof. The spring 18 serves as a means for holding the lock 17 when the same is positioned as shown in Figs. 2 and 4 and out of the path of movement of the latch bolt, and also when the said lock is adjusted into the path of the latch bolt.

The guard plate 22 bears upon posts 62-62 in the casing 5 and secured by screws 63 which pass through the said plate and screwed into the post 62. The guard plate 23 bears on posts 6464 arranged in the casing 5. The posts 64 are longer than the posts 62 so that when the guard plate is positioned and secured by suitable screws (not shown) which pass through the guard plate and screw into the posts, the said guard plate 23 is spaced from the guard plate 22 as shown in Fig. 5. The key post 24 extends through the guard plates 22 and 23 and a semi-circular guide 65 partially surrounds the key hole 26 of the guard plate 23 and also the post 24 and operates to guide the tubular shank of the key of the post 24. The key hole 26 in the guard plate 23 is arranged in angular relation to the key hole 27 in the guard plate 22. Thus the provision of the guard plates and the angular relation of the key holes will defeat any ordinary attempt to pick the look.

What is claimed as new is:

In a key operated lock the combination of a main bolt adapted to be operated by a key, and a bolt for holding said main bolt in a projected position, means engageable by the key for releasing the main bolt from the holding bolt, a supplemental bolt also adapted to be operated by the key, said main and supplemental bolt having engageable parts whereby the main bolt is moved to projected position when the supplemental bolt is moved to a similar position by the key and whereby the supplemental bolt is moved to retracted position when the main bolt is moved to retracted position by the key.

In testimony whereof I aflix my signature in presence of two witnesses.

CAPPELLI DOMENICO. Witnesses:

GEO. A. BYRNE, JOHN A. DONEGAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

